Main Program:
import java.util.Scanner;
public class ReadingMainExtNew {
static ReadingExtNew[] readings = new ReadingExtNew[50];
static int numOfReadings = 0;
public static void main(String args[]) {
bulkAdd();// to call reading method and display the menu in console
}
// this method is for add reading to the readings array
private static void bulkAdd() {
String annotation = null;
int readingId = 0;
double value = 0;
ReadingExtNew reading;
boolean valid = false;
Scanner in = new Scanner(System.in);
while (!valid) {
System.out.println(“Enter annotation: “);
annotation = in.next();
valid = annotation.length() >= 15;
if (!valid) {
System.out.println(“Please enter annotation with minimum 15 characters”);
}
}
valid = false;
while (!valid) {
try {
System.out.println(“Enter reading Id: “);
readingId = in.nextInt();
valid = true;
} catch (Exception e) {
System.out.println(“please enter number”);
in.next();
}
}
valid = false;
while (!valid) {
try {
System.out.println(“Enter value: “);
value = in.nextDouble();
valid = true;
} catch (Exception e) {
System.out.println(“please enter number”);
in.next();
}
}
reading = new ReadingExtNew(annotation, readingId, value);
readings[numOfReadings] = reading;
numOfReadings++;
System.out.println(reading);
addMenu();
}
// this is method is for calculate average value of all readings in readings
// array
private static void averageReading(ReadingExtNew[] readings, int numOfReadings) {
double sum = 0.0;
double avg = 0.0;
for (int i = 0; i < numOfReadings; i++) {
ReadingExtNew reading = readings[i];
sum = sum + reading.getValue();
if (numOfReadings > 0) {
avg = sum / numOfReadings; // to calculate average value of readings
}
}
System.out.println(“avg ” + avg);
menu();
}
// this method is for display all records in readings Array
private static void displayAllReadings() {
for (int i = 0; i < numOfReadings; i++) {
ReadingExtNew reading = readings[i];
System.out.println(reading);
}
menu();
}
// this method is for display all the Reading records in readings array
private static void displayLargestReading() {
int largestReadingIndex = 0;
ReadingExtNew largestReading = null;
for (int i = 0; i < numOfReadings; i++) {
largestReading = readings[largestReadingIndex];
if (readings[i].getValue() > largestReading.getValue()) {
largestReadingIndex = i;
}
}
largestReading = readings[largestReadingIndex];
System.out.println(largestReading);
menu();
}
private static void addMenu() {
System.out.println(“”);
boolean valid = false;
int option = 0;
Scanner in = new Scanner(System.in); // to read user entered data from console
System.out.println(“MENU SELECTION”);
System.out.println(“Options:”);
System.out.println(“1. Add another reading”);
System.out.println(“2. Menu”);
System.out.println(“3. Quit”);
System.out.println(“”);
while (!valid) { // validate the user input
try {
System.out.println(“Enter Selection: “);
option = in.nextInt(); // to read user entered Selection from console
valid = true;
} catch (Exception e) {
System.out.println(“please enter number”);
in.next();
}
}
// Switch construct
switch (option) {
case 1:
bulkAdd(); // to call addReading method
break;
case 2:
menu();
break;
case 3:
System.out.println(“Exit”);
in.close();
System.exit(0); // to exit from menu
break;
default:
System.out.println(“Invalid selection”);
menu();
break;
}
System.out.println(“n n”);
}
// this method is for display menu and based on menu selection it will give call
// the methods to add,display,and calculate average of all records and show the
// Reading with highest value
private static void menu() {
System.out.println(“”);
boolean valid = false;
int option = 0;
Scanner in = new Scanner(System.in); // to read user entered data from console
System.out.println(“MENU SELECTION”);
System.out.println(“Options:”);
System.out.println(“1. Add another reading”);
System.out.println(“2. Display all readings”);
System.out.println(“3. Display average reading”);
System.out.println(“4. Display largest reading”);
System.out.println(“5. Quit”);
System.out.println(“”);
while (!valid) { // validate the user input
try {
System.out.println(“Enter Selection: “);
option = in.nextInt(); // to read user entered Selection from console
valid = true;
} catch (Exception e) {
System.out.println(“please enter number”);
in.next();
}
}
// Switch construct
switch (option) {
case 1:
bulkAdd(); // to call addReading method
break;
case 2:
if (numOfReadings == 0) { // to check weather array has records
System.out.println(“No Readings Found,Please enter readings first”);
menu();
} else {
displayAllReadings(); // to call displayAllReadings method
}
break;
case 3:
if (numOfReadings == 0) {
System.out.println(“No Readings Found,Please enter readings first”);
menu();
} else {
averageReading(readings, numOfReadings); // to call averageReading method
}
break;
case 4:
if (numOfReadings == 0) {
System.out.println(“No Readings Found,Please enter readings first”);
} else {
displayLargestReading(); // to call displayLargestReading method
}
break;
case 5:
System.out.println(“Exit”);
in.close();
System.exit(0); // to exit from menu
break;
default:
System.out.println(“Invalid selection”);
menu();
break;
}
System.out.println(“n n”);
}
}
Data Type Program:
public class ReadingExtNew {
private String annotation;
private int readingId;
private double value;
public ReadingExtNew(String annotation, int readingId, double value) {
super();
this.annotation = annotation;
this.readingId = readingId;
this.value = value;
}
public String getAnnotation() {
return annotation;
}
public void setAnnotation(String annotation) {
this.annotation = annotation;
}
public int getReadingId() {
return readingId;
}
public void setReadingId(int readingId) {
this.readingId = readingId;
}
public double getValue() {
return value;
}
public void setValue(double value) {
this.value = value;
}
@Override
public String toString() {
String check = readingId == 0 ? ” check sensor” : readingId > 100 ? “check reading” : “”;
return “#” + readingId + ” : ” + value + ” (” + annotation + “) ” + check;
}
}
if you could explain the structure chart
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